arch/sparc/kernel/sys_sparc32.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
   3  *
   4  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   5  * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
   6  *
   7  * These routines maintain argument size conversion between 32bit and 64bit
   8  * environment.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/sched.h>
  13 #include <linux/capability.h>
  14 #include <linux/fs.h>
  15 #include <linux/mm.h>
  16 #include <linux/file.h>
  17 #include <linux/signal.h>
  18 #include <linux/resource.h>
  19 #include <linux/times.h>
  20 #include <linux/smp.h>
  21 #include <linux/sem.h>
  22 #include <linux/msg.h>
  23 #include <linux/shm.h>
  24 #include <linux/uio.h>
  25 #include <linux/nfs_fs.h>
  26 #include <linux/quota.h>
  27 #include <linux/poll.h>
  28 #include <linux/personality.h>
  29 #include <linux/stat.h>
  30 #include <linux/filter.h>
  31 #include <linux/highmem.h>
  32 #include <linux/highuid.h>
  33 #include <linux/mman.h>
  34 #include <linux/ipv6.h>
  35 #include <linux/in.h>
  36 #include <linux/icmpv6.h>
  37 #include <linux/syscalls.h>
  38 #include <linux/sysctl.h>
  39 #include <linux/binfmts.h>
  40 #include <linux/dnotify.h>
  41 #include <linux/security.h>
  42 #include <linux/compat.h>
  43 #include <linux/vfs.h>
  44 #include <linux/ptrace.h>
  45 #include <linux/slab.h>
  46
  47 #include <asm/types.h>
  48 #include <linux/uaccess.h>
  49 #include <asm/fpumacro.h>
  50 #include <asm/mmu_context.h>
  51 #include <asm/compat_signal.h>
  52
  53 #include "systbls.h"
  54
  55 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
  56 {
  57         if ((int)high < 0)
  58                 return -EINVAL;
  59         else
  60                 return sys_truncate(path, (high << 32) | low);
  61 }
  62
  63 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
  64 {
  65         if ((int)high < 0)
  66                 return -EINVAL;
  67         else
  68                 return sys_ftruncate(fd, (high << 32) | low);
  69 }
  70
  71 static int cp_compat_stat64(struct kstat *stat,
  72                             struct compat_stat64 __user *statbuf)
  73 {
  74         int err;
  75
  76         err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
  77         err |= put_user(stat->ino, &statbuf->st_ino);
  78         err |= put_user(stat->mode, &statbuf->st_mode);
  79         err |= put_user(stat->nlink, &statbuf->st_nlink);
  80         err |= put_user(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid);
  81         err |= put_user(from_kgid_munged(current_user_ns(), stat->gid), &statbuf->st_gid);
  82         err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
  83         err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
  84         err |= put_user(stat->size, &statbuf->st_size);
  85         err |= put_user(stat->blksize, &statbuf->st_blksize);
  86         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
  87         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
  88         err |= put_user(stat->blocks, &statbuf->st_blocks);
  89         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
  90         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
  91         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
  92         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
  93         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
  94         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
  95         err |= put_user(0, &statbuf->__unused4);
  96         err |= put_user(0, &statbuf->__unused5);
  97
  98         return err;
  99 }
 100
 101 asmlinkage long compat_sys_stat64(const char __user * filename,
 102                 struct compat_stat64 __user *statbuf)
 103 {
 104         struct kstat stat;
 105         int error = vfs_stat(filename, &stat);
 106
 107         if (!error)
 108                 error = cp_compat_stat64(&stat, statbuf);
 109         return error;
 110 }
 111
 112 asmlinkage long compat_sys_lstat64(const char __user * filename,
 113                 struct compat_stat64 __user *statbuf)
 114 {
 115         struct kstat stat;
 116         int error = vfs_lstat(filename, &stat);
 117
 118         if (!error)
 119                 error = cp_compat_stat64(&stat, statbuf);
 120         return error;
 121 }
 122
 123 asmlinkage long compat_sys_fstat64(unsigned int fd,
 124                 struct compat_stat64 __user * statbuf)
 125 {
 126         struct kstat stat;
 127         int error = vfs_fstat(fd, &stat);
 128
 129         if (!error)
 130                 error = cp_compat_stat64(&stat, statbuf);
 131         return error;
 132 }
 133
 134 asmlinkage long compat_sys_fstatat64(unsigned int dfd,
 135                 const char __user *filename,
 136                 struct compat_stat64 __user * statbuf, int flag)
 137 {
 138         struct kstat stat;
 139         int error;
 140
 141         error = vfs_fstatat(dfd, filename, &stat, flag);
 142         if (error)
 143                 return error;
 144         return cp_compat_stat64(&stat, statbuf);
 145 }
 146
 147 COMPAT_SYSCALL_DEFINE3(sparc_sigaction, int, sig,
 148                         struct compat_old_sigaction __user *,act,
 149                         struct compat_old_sigaction __user *,oact)
 150 {
 151         WARN_ON_ONCE(sig >= 0);
 152         return compat_sys_sigaction(-sig, act, oact);
 153 }
 154
 155 COMPAT_SYSCALL_DEFINE5(rt_sigaction, int, sig,
 156                         struct compat_sigaction __user *,act,
 157                         struct compat_sigaction __user *,oact,
 158                         void __user *,restorer,
 159                         compat_size_t,sigsetsize)
 160 {
 161         struct k_sigaction new_ka, old_ka;
 162         int ret;
 163         compat_sigset_t set32;
 164
 165         /* XXX: Don't preclude handling different sized sigset_t's.  */
 166         if (sigsetsize != sizeof(compat_sigset_t))
 167                 return -EINVAL;
 168
 169         if (act) {
 170                 u32 u_handler, u_restorer;
 171
 172                 new_ka.ka_restorer = restorer;
 173                 ret = get_user(u_handler, &act->sa_handler);
 174                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 175                 ret |= copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
 176                 sigset_from_compat(&new_ka.sa.sa_mask, &set32);
 177                 ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
 178                 ret |= get_user(u_restorer, &act->sa_restorer);
 179                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 180                 if (ret)
 181                         return -EFAULT;
 182         }
 183
 184         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 185
 186         if (!ret && oact) {
 187                 sigset_to_compat(&set32, &old_ka.sa.sa_mask);
 188                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 189                 ret |= copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
 190                 ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 191                 ret |= put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 192                 if (ret)
 193                         ret = -EFAULT;
 194         }
 195
 196         return ret;
 197 }
 198
 199 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
 200                                         char __user *ubuf,
 201                                         compat_size_t count,
 202                                         unsigned long poshi,
 203                                         unsigned long poslo)
 204 {
 205         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
 206 }
 207
 208 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
 209                                          char __user *ubuf,
 210                                          compat_size_t count,
 211                                          unsigned long poshi,
 212                                          unsigned long poslo)
 213 {
 214         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
 215 }
 216
 217 asmlinkage long compat_sys_readahead(int fd,
 218                                      unsigned long offhi,
 219                                      unsigned long offlo,
 220                                      compat_size_t count)
 221 {
 222         return sys_readahead(fd, (offhi << 32) | offlo, count);
 223 }
 224
 225 long compat_sys_fadvise64(int fd,
 226                           unsigned long offhi,
 227                           unsigned long offlo,
 228                           compat_size_t len, int advice)
 229 {
 230         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
 231 }
 232
 233 long compat_sys_fadvise64_64(int fd,
 234                              unsigned long offhi, unsigned long offlo,
 235                              unsigned long lenhi, unsigned long lenlo,
 236                              int advice)
 237 {
 238         return sys_fadvise64_64(fd,
 239                                 (offhi << 32) | offlo,
 240                                 (lenhi << 32) | lenlo,
 241                                 advice);
 242 }
 243
 244 long sys32_sync_file_range(unsigned int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, unsigned int flags)
 245 {
 246         return sys_sync_file_range(fd,
 247                                    (off_high << 32) | off_low,
 248                                    (nb_high << 32) | nb_low,
 249                                    flags);
 250 }
 251
 252 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
 253                                      u32 lenhi, u32 lenlo)
 254 {
 255         return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
 256                              ((loff_t)lenhi << 32) | lenlo);
 257 }